Nut-lock.



NUT LOCK. APPLIOATION FILED 111:0. 8, 1902..

N0 MODEL.

UNITED STATES Fatented ,Septem'berl, 190s.

ALBERT R. MULVANE, OF CORAOPOLIS, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 738,118, datedSeptember 1, 1903.

Application filed December 8, 1902. Serial No. 134,402. (No model.)

To all 2071,0771, it may concern:

Be it known that I, ALBERT R. .MULVANE, a citizen of the United Statesof America, re

siding at Coraopolis, in the county of Alle-r in any ordinaryconnections where it is desired to securely look a nut upon its bolt.

Briefly described, the invention comprises, in connection with theordinarily-threaded bolt, a washer whichis provided with aspring tongueor bolt which is adapted to engage with ratchet-teeth formed on theinner face of the supplemental washer, the latter being mounted on thebolt and provided at its outer face with a seat formed by cutting awaythe outer face of the supplemental washer,so that the nut will seattherein.

All of the above construction will be hereinafter more fully describedand then specifically pointed out in the appended claims, and indescribing the invention in detail reference is had to the accompanyingdrawings, forming a part of this specification, and wherein likenumerals of reference indicate like parts throughout the several views,in which- Figure l is a transverse vertical sectional view of arailroad-rail and the fish-plates, showing the application of myimprovednutlock to the bolt thereof. Fig. 2 is a plan view of the inner washer.Fig. 3 is a cross-sectional view on the line 3 3 of Fig. 2. Fig. 4 is atop plan view of the washer. Fig. 5 is a plan view of the outer andsupplemental washer. Fig. 6 is a side elevation of the same. Fig. 7 is aplan view showing the inner face of this washer. Fig. 8 is across-sectional view of the inner washer,taken on the line 8 8 of Fig.2.

To put my invention into practice, I employ abolt 1, which is providedwith the ordinary form of threads and any suitable or desired washercould be made of a width whereby its lower edge would engage the upperface of the rail-base, and it would thus be prevented from turning, thesame as though it were mounted in a recess in the fish-plate. Where thebolt is passed through wood or other like material, it will be necessaythat the washer 5 be countersunk into the wood, so as to prevent saidwasher from turning. This inner washer 5 is provided in its outer faceat one corner thereof with a recess 6, the bottom wall of which ispreferably made at a slight inclination, as best seen in Fig. 3 of thedrawings. In this recess is centrally mounted a spring catch or pawl 7,the base of which is of a thickness whereby the outer face of said pawlwill be flush with the outer face of the washer, thus completely fillingthe recess 6 at the inner portion thereof, but leaving a space back ofthe spring portion 7 of the pawl or catch. As stated, this inner washer5 is mounted on the bolt, and after it has been placed in position thesupplemental or outer washer 9 is placed on the bolt in contact with theinner washer 5. This outer washer 9' is provided on its outer face witha cut-away portion or recess 10, into which the nut 11 is adapted toseat. The inner face of the washer 9 is provided with a series of teeth12, forming the ratchets, which are adapted to engage and lock with thespring or pawl 7, carried by the inner washer 5. These teeth or ratchets12, it is to be noted, are not cut radially 0n the face of the washer,but all extend at an angle to a radial line, as best seen in Fig. 7 ofthe drawings, whereby the shoulder or edge of the teeth will moresecurely lock against the spring or pawl 7. The teeth or ratchets 12, asthe washer 9 and nut 11 are tightened, firmly engage against the outerface of the washer 5, and the spring engaging back of each successivetooth or ratchet effectually prevents the unscrewing of theratchet-washer and the nut, which are locked together by reason of thenut being partially embedded in the washer. \Vhen it is desired toremove the nut, the spring 7 is depressed within the recess 6, so as tomove the same out of the path of the teeth in the backward movement ofthe washer 9, thus allowing the free unscrewing of the said Washer andthe nut 11. As the recess 6 is cut with its base at an incline, thespring 7 projects therethrough at an incline to the central plane of thewasher, and for this reason it is more firmly engaged by theratchet-teeth 12.

While I have herein shown and described in detail my invention as itisin practice, yet it will be observed that various slight changes may bemade in the details of construction without departing from the generalspirit of the invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a nut-lock, the combination with abolt,

of a washer having a recess, a spring tongue or pawl lodged in saidrecess with a portion thereof flush with the outer face of the washerand a part thereof projecting normally beyond the outer face of thewasher, a ratchet- Washer adapted to engage with said spring tongue orpawl and provided in its outer face with a recess, and a nut engaging insaid recess to be revolved on the bolt in unison with theratohet-washer,substantially as described. In testimony whereof I affixmy signature in the presence of two witnesses.

ALBERT R. MULVANE. W'itnesses:

A. M. WILSON, E. E. POTTER.

